Too much speculation presented as established fact, too much political agenda, too much reading an old fiction story and extrapolating it to the entire population, too many inaccuracies and outright lies, too much emphasis on warfare, too little (almost zero) attention paid to the daily lives of the people and their engineering accomplishments, not even a hint of how the Roman Catholic church suppressed engineering and science, not a single mention of the great armies that the church sent out to conquer the world, no clue at all about what caused the economic disasters that lead to widespread povery, and only one sentence that begrudgingly acknowledged that some people might possibly speculate that the Little Ice Age happened and it might have had some marginal influence on widespread crop failures.

They should have named it "The History of the Early Middle Ages As Fantasized by Vatican Propagandists."